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8 Sheets-Sheet 1 Dec. 29, 1936. o. THIEME COMBINED TYPEWRITING AND COMPUTING MACHINE original Filed Aug. 29, 1929 Dec. 29, 1936. o. THIEME COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed Aug. 29, 1929 8 Sheets-Sheet 2 Dec. 29, 1936. o. THIEME 2,066,128

COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed Aug. 29, 1929 v8 Sheets-Sheet 3 Snnentor 35g I l l Gtto eg O. THIEME De'c. 29, 1936.

COMBINED TYPEWHITING AND COMPUTING MACHINE Original Filed Aug. 29, 1929 8 Sheets-Sheet 4 .k... ,Il

Dec. 29, 1936. o. THIEME G OMBINED TYPEWRITING AND COMPUTING MACHINE original Filed Aug. 29, 1929 8 Sheets-Sheet 5 l'snventor Dec. 29, 1936. Q THlEME 2,066,128

COMBINED TYPEWRITING AND COMPUTING MACf'lINE Original Filed Aug. 29, 1929 8 Sheets-Sheet 6 rmm '7/////////////////// O. THIEME Dec. 29, 1936.

COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed Aug. 29, 1929 8 Sheets-Sheet '7 De. 29, 1936. o. THIEME 2,066,128

COMBINED TYPEWRITING AND COMPUTING MACHINE original Filed Aug. 29, 1929 8 sheets-sheet s Patented Dec. 29, 1936 COMBINED TYPEWRITING AND COMPUTING MACHINE Otto Thieme, Hartford, Conn., assignor, by mesne assignments, to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Dela- Ware Original application August 29, 1929, Serial No.

389,152. Divided and this application October'l 8, 1931, Serial No. 567,605

` 7 Claims.

This invention relates to combined typewriting and computing machines of the Underwood-Hanson class, and discloses a power-operated portable or desk-machine, as distinguished from the machine heretofore mounted upon a truck to be 'wheeled from place to place for manipulation.

Some of the novel features include a motorunit that can be applied to a hand-operated computing machine already in use, to convert the machine into a power-driven mechanism; a motor-unit compactly mounted upon the rear of the machine-frame, with reduction gearing and a clutch having a direct driving connection with the general operator, and effective without increasing the height of the machine and without spreading the parallel trains of yregistering mechanisms of the standard two-register machine, for driving the connections to the general operator; a computing base-frame having punchedout mechanism-supporting and mechanism-enclosing sheet-metal side plates to supersede the usual lacquered cast plates that require special protection to prevent injury during the assembly of the computing mechanisms and during the storage of the fully-assembled computing base as a stock-unit; the unfinished sides of the computing base, after it is completely assembled in the typewriting-machine frame, being enclosed by die-formed highly polished thin sheet-metal plates, as a nal assembly operation for the combined machine; a simpliiied means for rendering the transposition levers ineiective to advance the pin-bars seriatim to pin-setting positions, and thereby silencing the pin-setting function rof the numeral-keys in typing; a transposition mechanism pre-assembled and pre-adjusted to form a nished stock-,unit contained within an attachable frame, that includes an aligning and supporting comb for the pin-bars, and also shftable fulcrum-rod connectionsl for the series of transposition levers, the fulcrum-rod of said series of levers being shiftabie to a position where the Adenomination-selecting push-rods will be ineiective to shift the pin-bars to pin-setting position; an improved column-stop provided with means reinforcing the subtraction-setting lmember of the stop, to check the rocking of the stop upon the stop-bar, while operating the train of depressible subtraction-setting mechanism;

50 an improved mechanism eiective to lock the numeral-keys in certain zones,and during the automatic return of the carriage and the tabulation of the carriage; connections with the non-compute key automatically effective to silence the transposition mechanism and simultaneously release the locked numeral-keys for typing only; improved means for locking the subtraction-key while the error-key is effective; improved means for locking the error-key while the subtractionkey is depressed; and improved means for lock-v separated transposition mechanisms, by the ern-v ployment of novel light, long, two-part denomination-rods, each eiective to transmit the required lateral or angular thrust without cranking or buckling effect; and the provision of four separate assembled units, a typewriting mechanism, a computing mechanism, a motor-driving f mechanism and a fan-fold web and carbonfeeding mechanism, all four mechanisms combined to form a compact machine-unit; and also sockets provided for the motor and carriage frames, to receive rods or struts to support the fan-fold web tracks over the motor-mechanism.

This is a division of my application, Serial No` 389,152, filed August 29, 1929.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a vertical section, fore and aft of the machine, showing a typewriting machine, with motor-driven computing mechanism.

Figure 2 is a vertical section through the denominational stop-frame, showing a novel column-stop adjusted to the carriage rack-bar and having stop-means engageable by the denominational stops, and a tappet-means selectively operable to operate the thrust-bars and transposition levers.

Figure 3 is a skeleton perspective view, showing the two spaced-apart sets. of transposition levers, each set connected by a group of thrustrods, the groups converging to a central computing zone for both registers.

Figure 4`is an enlarged perspective view of portions of the general operator, showing a cross. bar having a pitman-connection to the motor.

Figure 5 is a detail construction of the pivotal pitman-connection to the cross-bar of Figure 4.

Figure 6 is a detail, in perspective, showing a connection between the carriage-returning mechanism and the numeral-key-locking means.

Figure 7 is an enlarged perspective view with parts of the computing means broken away to discloae the registering mechanism and the control of the register-wheel detents, to determine the state of the numeral-wheels by an interlock with the star-key.

Figure 8 is a perspective view of some of the computing mechanism, including the subtractionkey, the error-key and motor-starting key and connections.

Figure 9 is a plan view of a two-way shuttle interlock between the error-key and the motorstarting key to avoid simultaneous depression of these keys.

Figure 10 is a diagrammatic view, showing the operating handle on its forward stroke and the means effective to prevent the depression of the error-key.

Figure l1 is a sectional view through one of the machine-supporting metal feet of the typewriting machine, the hardened lugs on the computing-machine base upon which the feet rest, and the tapered locking pins that removably secure the feet in position to lock the typewritingmachine base to the computing-machine base.

Figure 12 shows a carriage-return clutch in interlock, and the means Vibrated by the pinionshaft operative to lift a train of mechanism and lock the keys until the carriage-return movement is completed.

Figure 13 shows the parts of Figure 11 in lifted or key-locking position.

Figure 14 is a. fragmentary perspective view of the carriage-releasing universal bar and connections that are rendered effective when a tabulating key is depressed.

Figure 15 is a plan View of the special columnstop adjustable upon the carriage-stop bar, showing the means for reinforcing the usual subtraction-setting extension.

4Figures 16 and 17 illustrate the detenting assemblage for the register-wheels, and the condition of the star-key when the wheels are no cleared to zero.

Figure 18 is a fragmentary front view of the pin-setting frame, showing the locking interponent that fills up the working gap between the series of interlocking pendants and the novel means for controlling the interponent.

Figure 19 shows the general operator moved forwardly, which causes the silencing of the transposition levers and locks the numeralkeys until the return cycle of the general operator restores these parts to normal position.

Figure 20 shows the non-compute mechanism and the novel way of releasing the locked numeral-keys, and the connections for silencing the transposition levers to the pin-bars.

Figure 21 is an inverted plan view of the motorunit including the motor-driven parts and the motor-circuits.

Figure 22 is a perspective normal view of the motor-driven parts, the top wall of the casing being omitted.

Figure 23 is a plan view of the parts shown at Figure 22, where the tripping means releases certain of the parts, and the motor-circuit is closed.

Figure 24 is a perspective view of the assembled typewriting, computing and fan-folding mechanisms forming a compact machine-unit that rests upon a table.

Figure 25 is a plan view, showing the detail structure of the computing-machine base.

In Figure 1 of the drawings, alphabet-keys 25 23, to vibrate a bell-crank 33 about a rod 3|,

to swing a. type-bar 32 about a segment-wire 33 upwardly and rearwardly to strike a platen 34. The platen may be supported by a platen-shaft 35 having bearings in each carriage-end 36, and may be provided with the usual line-spacing and paper-feeding devices, not shown. A carriage 31 includes a rectangular frame mounted to ride upon rails 38 under the tension ci' a carriage-motor, not shown. To feed the carriage in letter-spacing, the usual carriage-feed-rack 38 is in train with a pinion 40 that is controlled by an escapement-mechanism, not shown, but which may be operated by a universal bar 4| vibrated by each type-bar in typing, in the well-known Underwood manner.

The carriage also has a tabulating mechanism including a rack-bar 42 supported by brackets 43 at the rear of each carriage-end 36, to receive column-stops 44 adjustably assembled therealong. The usual denominational tabulator-keys 45 at the front of the keyboard depress levers 45, to lift vertically-disposed denominational stops 4T and project the upper free ends thereof into the path of an advancing carriage-stop 44. Each stop 41 has a notch 48, Figure 14, to engage a universal bar 49 to rock a shaft 5U when any stop 41 is lifted, to operate a crank-arm 5l, to release the carriage-rack from the escapementpinion, as shown in the patent to Roberts, 1,066,224, dated July 1, 1913.

The carriage is provided with a motor-driven carriage-return mechanism, in many aspects disclosed in the patent to Henry L. Pitman, 1,580,326, datedApril 13, 1926. A carriage-return key 52 is connected to an arm 53 of a bell-crank pivoted upon a stationary stud 54, formed with an upright arm 55 and provided with a spring. The arm 55 may be a trip arm operative to swing under a tripping cam 56, Figure 12, fixed tothe forward end of a bar 51 formed with a notch 51l to engage the bottom of a slot in the key-lever front comb 51h. The rear end oi the bar 51 is pivotally suspended from the end of an arm 58 fixed to a shaft 59, carrying a crank-arm 60 connected by a link 6I to an arm 62 depending from a shaft 63, having a second arm 64 connected by a forwardly-extending bar 65 which communicates by a link 66 to the end of an arm 61 secured to a rock-shaft 68.

The shaft 63 has an operating arm 69 provided with an anti-friction ball-terminal 18 operative between flanges 1| of a pinion 12 slidable upon a shaft 13 and at al1 times in tooth engagement with a rack 14 secured to the carriage 31. The pinion 13 is formed with clutch-teeth 15 shiftable with the pinion to engage with thc teeth of a clutch-head 16 fixed to the shaft 13 and rotated by a pulley 11 connected to a novel source of power to be described.

Depression of the key 52 trips the cam 56 to raise the front end of the bar 51, to lift the notch 51 free of the comb-plate 51b to respond to the tension of a spring 16 to rock the shafts 59, 43 and 68, and shift the pinion 12 into clutching engagement with the head 16, to return the carriage when power is transmitted to the pulley 11. 'Ihe rocking of the shaft 53 rocks an arm 19 to push a bar 80, communicating with the make-andbreak switch-arm 6I, shown at Figure 2l, that closes a plugged-in circuit to a motor l2, which drives a belt 83 connected to the pulley 11 to drive the returning pinion 12.

A trip on the carriage, similar to that disclosed in the patent to Frederick A. Hart, 1,238,908,

dated September 4, 1917, operates to rock the shaft 68 in a clockwise direction to effect the release of the pinion 12 from the rotating clutchhead 16, withdraw the bar 80 and the switch-arm 8| to open the motor-circuit and at the same time shift the bar 51 forwardly to re-engage the barholding notch 51a with the comb 51h.

Instead of a manual carriage-return control as by the key 52, said patent to Hart also discloses a marginal stop-control at the line-end position ,of the carriage which effects the depression of a vertical link 82a, to swing a lever 83* to engage a stud 84 on the bar 51 and lift the notch 51 out of the comb-slot and free the bar and connections to the spring 18 to effect the return of the carriage independently of the key 52.

Figure 14 shows means for preventing the depression of the carriage-return key 52 while any tabulator-key is depressed. 'Ihe shaft 50 has an arm 85 to interfere with the rearward sliding movement of the bar 80 and prevent closing of the switch-arm 8| to start the motor. 'I'he depression of any tabulator-key 45 is also prevented during the depression of the carriage-return key, the bar 80 passing over the end of the arm 85 to prevent the lifting of said arm and arrest the movement of the universal bar 49 by any stop 41, all as more fully described in the patent to Adolph G. Kupetz, 1,807,626, dated June 2, 1931.

The column-stop shown in Figure 2 is an improvement on the stop shown in my Patent No. 1,649,329, dated November 15, 1927, where the stop hasteeth 86 that enter slots cut in the under "face of the bar 42, and is supported by a springpressed clip 81 `{that is formed with stop-holding arid stop-positioning detents 88. The stop is further formed with a depending lip 89 to be engaged by the tabulator-stops 41. The tabulator stop- -fr'ame 90 includes a horizontal plate-extension 9 I, the end of which supports an L-shaped bracket 92 th-at includes a horizontal housing section 93 paralleling the extension 9|. 'I'he rear end of the stop carries an anti-friction roller 94 which rolls against the under face of the section 93 to prevent the stop from being cammed upward in passing over upright selecting devices, to be described. To further reinforce the stopy and maintain its alignment, the stop may be provided with a rachet-shaped tooth 95, Figures 2 and 3, to interlock with the ratchet-teeth of a universal bar 96. 'Ihe latter has bent-over end-arms 91 having screws or pivot supports 98 for the ends of the rack 42. A scale-plate 99 is held above lthe bar 42, by which the stops 44 may be set from a reading at the platen-scale. A spring |00 presses the bar 96 into engagement with the tooth 95 of each stop 44 adjusted upon the rack 42.

Heretofore, the Underwood-Hanson computing-machine base-frame, upon which the typewriter is assembled for cov-operation, included cast iron plates, pre-machined and highly lacquered before the assembly of the parts, and these surfaces had to be carefully protected from mars and-scratches during the subsequent handling and the assembling of the many complicated parts. The assembly of all the parts within the enclosing cast iron plates presents dimcult problems, especially for readjustments, and such shafts, screws, etc., that penetrate the polished side plates, required much costly nickel work.

The present structure includes the substitution of thin cold-rolled, punched-out, steel plates. |0| and |02. 'I'hese plates in their original state are smooth, polished and of uniform thickness, and all clearance-slots and holes to be threaded may be pierced by the punching operation.

Referring to Figure 25 in particular, the .two plates I0| and |02 are each provided at the front end with a stiffening bar |03 permanently secured to the inner face of the plates. A front coverplate |04 may be secured by screws |05 threaded into said bars.

The rear ends of the plates |0| and 02 are also supplied with bars |06, to which feet |01 of a motor-supporting frame or casing |08 may be secured, to the tie the two rear ends of the plates together and complete the computing base.

To further stabilize this sheet-metal frame, there are provided a register-supporting crossbar |09 and a transposition linkage-supporting bar I0, both bars secured between the two plates |0| and |02 by means of screws III threaded from the outside of the plates.

Thin japanned side plates ||2 may rest upon the faces of the bars |06 with the forward end bent over for a round corner, to maintain parallelism of the side plates with the plates |0| and |02, and the side plates being secured by screws ||3 that thread into the ends of suitable platespacing studs ||4 secured to the side plates |0| and |02. In this manner, there is provided a working space at each side of the base-frame between the plates |0| and |02 and the side plates II2, where unfinished screw-heads, springs and fiat steel linkages and other connecting mechanism may be exposed and be readily accessible for adjustments upon the removal1 of the coverplates ||2. These cover-plates mask the main framework and give an attractive finish to the machine.`

'I'he computing base may also include a sunken top plate or iloor I I5 secured to suitable blocks I6 on said plates |0| and |02 to support the con- `fined subtraction-key mechanism ||1 and elimination-key mechanism I8.

The side plates |0| and |02 are further provided With permanent felt-protected feet ||9 formed by a screw-machine operation into a bell-shaped unit with a boss-section |20 at one end, and the other end counterbored for a rubber pad |2| and drilled and tapped for a pad-retaining screw. 'I'he boss-section |20 is straddlemilled to form an integral central tongue |20a and also to form a seat for the edge of the plates, and the tongue may be positioned against the side plates |0| and |02 and riveted thereto at |22. Four feet ||9 may be assembled to the side plates in the manner described, and a special foot I9 that supports the motor-frame |08 may be attached by a foot-holding screw |23 threaded into the frame |08. The base-frame may also tothe upper face of the top plate ||5, see Figure 3.

The typewriting-machine base does not rest upon the top edges of the two side plates I 0| and |02, but the hardened feet |25 restupon the grooves |26 in the side plates. For this purpose, each foot may include an annular groove |29, see Figure 1l, and a clamping screw |30 may be threaded through the side plate and formed with a conical head |3| which may be drawn into the annular groove of a foot, to lock it and prevent upward displacement of the feet from the blocks |28. The screw |30 may have a lock-nut |32.

From the description of this built-up computing-base section it will be understood that the frame may pass through the mauling stages of bench-assembly and require no cumbersome wrappings to protect finished surfaces, and that at the nal assembly of all the computing mechanisms therewithin, the base becomes a unit thatv can be stored on shelves as a stock-product requiring no particular protection from injury by surface-contact. Y

It will also be noted that the computing base may be fully assembled before the motor and its casing are attached, thus relieving `the assemblers of the labor of shifting this added motorweight during the many assembly-operations, and that the surface-finished motor-casing may be the final addition to the unit.

The motor-supporting casing |08 converges rearwardly from the position of the side feet |01, secured to each end oi the side plates and |02, to a point midway between the two plates, giving a central position to the motor 82; and its driving transmission extends forwardly through the longitudinal center 'of the base and between the two registering mechanisms of the computing mechanism.

The side wall of the motor-casing merges with a short hollow pedestal |33 to support a flange |34 oi the vertically-disposed motor 82 that may be secured by screws |35. The free end of motor-shaft |35 takes an end bearing in a horizontal wall |31 at a point between a pedestal-space |38 and a space |30 in the casing |08. The motor-shaft carries a worm |40, eiiective to drive a worm-gear |4| secured to a horizontal shaft |42, having bearings in the side walls of thc pedestal |33; and the exposed forward end of said shaft |42 is provided with a driving pulley |43 which communicates power by the belt 83 to the pulley 11.

Each numeral-key 25 has a pendant |44 which when depressed engages a crank-arm |45 to rock a shaft |46, that moves a pin-setting bar |41 to depress one of a series of index-pins |48 in a pinbar |49; there being one bar for each registerwheel |50.

The column-stop 44 is formed with a tappet to engage the upper ends of thrust-rods |52 as the carriage letter-spaces the tappet step by step througha computing zone. l Each thrustrod |52 has its lower end threaded into a clevis |53 pivotally secured to the outer end of a lever |54, and the series of levers may be fulcrumed upon a rod |55 having end-bearings in brackets |55a in the cross-bar H0. The inner ends of the levers |54 engage arms |56 of transposing levers |51, nested together upon a fulcrum-rod |92 to reverse the denominational order from the rods |52 to the pin-bars |49, through an arm |58 engaging a stud-pin |59 in each bar. The pin-bars |49 are shifted longitudinally seriatim nder the pin-setting bars |41 as the tappet |5| depresses Spring |6| restores the bar when released, and brings a. file-spotted face |62 into contact with the face of a bar-supporting combplate |63, forming a part of a frame secured to the cross-bar I|0, said frame in turn supporting a 'second comb |65, that spaces the levers |54 and the arms |56 of the transposing levers.

The index-pins are projected into the path of a cross-bar |66 of a general operator, that includes a rack |61, which may be driven by a sector |68 through an intermediate pinion |69; the bar |66 picking up the depressed pins and shifting their bars |43 forwardly to rotate registerwheels |50. I

Each wheel |50 may be held by the round nose of a detent-lever 235 engaging depressions or notches formed at the side of each registerwheel. The return-stroke of the bar |49 idly rotates a pinion through the usual pawl-andratchet individual to each number-wheel, not shown. The return-stroke of the general operator effects the restoration of the parts, and the usual pin-restoring platform |1| is lifted by an arm |12 secured to a shaft |13, provided with a second arm |13a carrying a stud to be engaged by one arm |14 of a bell-crank mounted upon a shaft and having a second arm |16 that carries a roller |11 to be engaged by a cam |18 iixed upc-n a shaft |19 that is rockable by the usual operating lever |80 to raise the platform |1| w restore the set-up pins |48.

In kPitman Patent No. 1,827,298, dated October i3, 1931, the sets of denominational thrustrods diverge downwardly from the carriage, so that the vertical thrusts received at the tops of the rods may effect vertical thrusts at the widely-separated sets of transposition levers. This construction of the rods tends to create a cranking action that incurs liability of buckling of the light thrust-rods.

The present invention includes two parallel trains of registering elements A and B, selectively operated by indivi-dual series of transposition levers |54, assembled upon a standard tworegister base, there being sufficient working space between the trains to accommodate elements of the general operator; and each series of levers is connected with a. series of inclined thrustrods. The thrust of each rod is diagonal, as determined by a. straight line intersecting the point of translation at the top of the rod and the point of transmission at the bottom of the rod. The levers |54 in each set may diverge rearwardly, and each lever may be twisted to align'with its rod, and each clevis |53 may have a straight threaded connection to its rod. The upper ends of the rods |52 instead of contacting directly with the tappet |5| ar'e provided with motiontranslating intermediaries in the form of vertical pins that are engageable by the tappet |5|,

The plate 9|, Figure 2, supports an under parallel plate |8| separated by washers |82 and secured by screws |83. The plate 9| is drilled with two or more series of verticalguide-holes |84 for pins |85. The pins are at letter-space intervals.

The loose fitting round-nosed pins or plungers |85 are assembled in the holes |84 from the under side of the plate 9|, and project upwardly, a suitable head on each pin engaging the under face of said plate. The thrust-rod-holes in the plate |8| are drilled obliquely, each in the general direction of its thrust-rod.

In this manner little carriage-driving power is consumed in causing the tappet |5| to ride over and across a pin |85, andthe transmission of motion from a vertically-movable pin-head to its obliquely-thmstable rods |52 is accomplished without waste. The individual adjustability of each clevis to its rod makes it feasible to preunder a slight tension and take up any slack in the connections.

The present invention employs a simple silencing means, for bodily shifting back out of use the fuicruin-rod upon which the transposition levers are mounted. The rods |52 are thereby rendered ineffective .to actuate the studs |59 of the pin-bars |49.

To this end, at Figure 3, each nest of transposition levers is assembled asa stock unit within a frame |86 secured by screws to the cross-bar |09 of the base-frame. The frame |86 includes the vertical comb-plate |63 that supports the rear ends of the'pin-bars, and two vertical side arms |81 that provide bearings for a rockable shaft |88. To one end of theshaft |88 a bell-crank may be secured, having two arms |89 and |90, the arm |89 formed with a slot |9| to engage the shouldered down end of a fulcrum-rod |92 that rides in a slot |93 in each arm |81.

The opposite'end of the shaft |88 may have secured thereto a slotted arm |89a and forming a part of a three-arm bell-crank having other arms |94 and |95. The arm |89a engages the adjacent end of the fulcrum-rod |92 supported by the slots |93 in each arm |81, and thereby suspends the series of transposition levers |54. When the shaft l|88 is rocked by mechanism to be described, the fulcrum-rod |92 will move rearwardly alongv the slots |93, and the upright arms |58 of the transposition levers will draw away from the studs |59 of the pin-bars, .and the subsequent rocking of these arms by the carriage will fail to operate the studs |59, and the numeral-key will become ineffective for`pin-setting. This description will apply to either transposition group A or B.

There are separate assembly units for the transposition mechanism, and the individual rock-shafts |88 are coupled for a unitary movement, from connections that lead to only one of said units. This coupling includes a crank |96 iixed to the inner end of the shaft |88 of lthe group A and provided with a stud |91 to pass through a slot |98 in an arm |99 secured to the inner end of the shaft |88 of the group B. When the arm |90 is rocked to silence the transposition devices of group A, this motion will be transmitted to the other shaft |88 to silence the group B.

One means for jointly silencing the transposition devices includes a non-compute key 200, shown at Figure 20, where the key has been drawn forwardly to rockabout a fulcrum-rod 20| to rock the lower arm 202 .thereof rearwardly. Through a pin-and-slot connection 203 bar 204 is pushed rearwardly, and a side stud 205 vibrates an arm 208 fulcrumed uponastud 201 to flex a restoring spring 208. The bar 204 has a sliding movement through a supporting stud 2 I9 on the top plate I5, with the forward end at 203 pivotally supported by a'link |188L having a springpressed pin-and-slot connection |85a with an arm |64 loosely mounted upon 'the shaft |19. The arm v286 has alone-way connection to a lever 209 through a bent-over ear 2|0, to vibrate the lower end of saidlever and rock the arm |90, to rock the shaft |88 and silence the transposition devices.

The bar 204 has a detenting notch 2|| engageable with a'slotted bracket 2|2, to hold the bar against the tension'of the spring 208, until the general operator rotates the shaft |19 and the cam |18 to cause the link |18el to lift the end of the bar 204 and release its notch 2| from interlock with the bracket 2|2; and a second notch 2|3 on the released bar will engage the bracket, this being the normal position of the bar 204.

The rocking of the shaft |88 by the non-compute key rocks an arm |94 xed thereto, to engage an arm 2|5 of a bell-crank 2| 6 fulcrumed upon a cross-rod 2|1, having a second -arm 2|8 engageable with an arm 2|9a fuicrumed upon the rod 2|1 and connected to one end of a link 220. The link 220 is pivoted to the free end of an arm 22|, secured to a rock-shaft 222-to rockv the shaft when the non-compute key is shifted to the Figure 20 position. Upon the shaft 222 there is loosely held by a pin-and-slot connection 223 and a spring 224 an interponent 225, arranged to be moved into the working gap between a series of pendent key-locking dogs 226, to prevent the depression of any numeral-key while the non-compute key is being moved to its effective position.

But as it is not desired to lock the'numeralkeys during theinterval the non-compute key is held locked to silence the transposition levers, means are provided to unlock said keys so that numerals may be typed and not computed. To this end, the bar 204 has a side projecting stud 221 to engage a-bell-crank arm 228 fulcrumed upon the pin-setting frame 23| to depress a second arm 229 to' depress a slide 230 mounted upon the front face. of the frame 23| for a free vertical movement upon a stud 232, see Figure 18. The slide 230 engages the interponent 225 to -swing it downward to the position of Figure y18 while the spring 224 is flexed and the shaft 222 remains stationary. The withdrawal of the interponent 225 permits the extremeend dog 226n to abut the fixed stud 232 and create a work- 'ing gap in the series of dogs 226 for the passage of any key-stem |44EL to type.

Thus during the interval the non-compute key remains locked, the accidental operation of any of the several connections to the rock-shaft 222 will rock the shaft in the usual waybut said shaft'will be ineffective to raise the interponent 225 to ll up the stem-clearance gap in the series of dogs 226. l

'I'he present improvement includes a star-key lockingmechanism having the usual universal bar set by the detent-levers to a position where no movement of said bar will take place after its first movement, because of rits latched condition, and all subsequent accumulating operations of the register-wheelsgwill only operate the detent-levers,` to preserve the alignment of the Wheels.

To this end, the two side frames 233, Figure 7, of each register have a fulcrum-rod 234 upon which there are mounted detentlevers 235, each lever having ,an individual spring 236 topress the round nose 231 thereof into engagement with the round-nose wheel 238 forming a part of each register-wheel |50. Each detent is formed with a short arm 239 to engage a, universal bar 240 formed as a detent-straddling bail with two arms 24| loosely mounted on the projecting ends of the rod 234 and spring-pressed against the arms 239 of the detents by a suitable spring 242 connected to each arm 24|. Each wheel 238 has' a special depression or notch 2388L between two adjoining teeth where the round nose 231 of its detent-lever will have a greater drop than when entering thel other depressions. This special detenting position corresponds with the zero on the wheels at the sight-opening of the register.

The rotation of any register-wheel from its zero position drives its detent-levers against the universal bar 248 to move the latter, and through studs 243, each arm 24| moves one of two frames 244B and 244i), each frame including two arms 244 and 245 joined together by a sleeve 246 mounted to rock upon a rod 241 supported at each end by brackets 248 secured to the frame.

Each outer arm 245 has a spring'249. To check the frame 244a or 244b from pressing against the studs 243, each arm 244 carries a projecting lug 258 secured at the side thereof, to engage in a notch 25| in the end of a latch 252. The latch is pivoted upon a stud 253, and arranged to drop behind its lug 258 when the frame is fully operated by any detent 235, in being forced out of the notch 238, as shown at Figure 16, to lock frame 244ii or 244h in its set position. In this way a comparatively strong spring 249 may be flexed to set the frames 244* and 244D, but only a light spring-tension 242 holds the universal bar against the detents 235, thus minimizing the work of the register-driving pin-bar.

The upper end of one arm 244 is connected by a link 254 to one end of a lever 255, fulcrumed to the under face of the top plate ||5, with the opposite end 256 formed to dog within sawtoothed notches 251 of a vertically-disposed plunger 258, pendent from a star-key lever 259 associated with the register A, and depressible by the key, to pass through a guiding bushing 268.

In a similar manner the locking of the frame 244b for the register B swings the lever 26| to engage notches 251 in-the plunger 262 connected to the key-lever 263 of the star-key associated with the register B. When the several parts are set by the operation of any detent 235 to the positions shown at Figure 17, the rocking of the frame 244b has shifted the lever 26|, so that its dogging endwill enter a locking notch 251 of a plunger 262 connected to star-key-lever 263 where it remains until the wheels 238 have been cleared.

At Figure 1 the register-wheels all register zero,

the latches 252 have released the lugs 258, and

both frames 244 and 244b have responded to their springs 249 and both levers 255 and 26| have been vibrated to release both star-key-levers 259 and 263, all made possible through the detents 235 entering the special deep depression 238l in each wheel 238 of both registers A and B.

From this zero or clear position, the accumulation of the rst digit of any wheel |58 forces the key 259 and the stud 243 almost strikes the end of a bell-crank arm 264 fulcrumed upon the stud 253. 'I'his bell-crank has a second arm 265, carrying a pin 266 engageable within a slot 261 in an arm 268 fulcrumed at 269 to the side frame 233, and .formed with a second slot 218, to engage a pin 21| cn a short arn 212 of the latch 252. This chain of links, under tension of a single spring 213 connected to the arm 265, secures the interlock between the latch 252 and the lug 258.

At Figure 17 it will be noted that the movement of the bar 248 by a detent 235 moves the stud 243 to give a clearance space between the arm 264 and the stud, so that the stud 243 will not be moved by said arm 264.

In clearing the wheels |58 lfrom 9 to "0, the detents 235 will ride from the highest point of a tooth of the wheels 238 into the special depression 238a as the zero position of the wheels, and the spring 242 will move the bar 248 towards the register-wheels, and the stud 243 will engage the arm 284 to rock the arm 268 to move the arm 212 and lift the latch 252 clear of the lug`258 and free the associated frame as 244B to the exed spring 249, and release the locked star-key-lever 259, provided all the rest of the wheels |58 are cleared to zero. The train of parts released by the stud. 243 are motion-multiplying parts, so that a very slight movement of said stud will move the latch 252 a greater distance to effect the release of the frame 2443.

The zero or elimination key 214 includes a push bar 215 mounted for sliding motion adjacent the right-hand side of the plate 5. The bar 215 is formed with a bent-over foot 216 that adjust-ably supports a toothed plate 211. The teeth thereof, in sliding with the bar, engage a two-way pawl 218 pivotally mounted on the plate ||5 and having a pawl-centering spring 219, which enables the pawl to perform a full-stroke function relatively to the teeth of the plate 211, to insure a full movement of the error-key-bar 215 in both directions.

The bar 215 is slidable between stops 288 on the bar and a fixed stop 28| on the plate I5, and is restored by a spring 282. The function of the error-key, when depressed, is to vibrate the pinrestoring platform, and on the initial return movement thereof, to effect a cycle Iof the general operator. To this end, the bar 215 may be formed with a cam-edge 283 to lift a roll 284 secured to the upper end of a vertically-disposed bar 285, having a guiding slot through the plate |5 while the lower free end has a pivotal connection at 286 to the forward arm 281 of the lever |14, to rock the shaft |13 and arm |12 to raise the pin-setting platform |1| as previously described. At the end of the stroke of the key 214,'the roll 284 will ride upon a flat dwell 288.

At the extreme rear end of the bar 215 there is formed a horizontal shelf 289, supporting a tripping cam 298 fulcrumed upon a screw 29| threaded into said shelf and having a spring 292. The

lever, so that when the depressed key 214 is released to the control of its spring 282, the arm 294 presents a cam-face that will operate the lever 295. The lever 295, which is fulcrumed at 296 to a bracket 291 secured to the plate ||5` is formed with a bifurcated end that engages a stud 298 projecting from the side of a latch-bar 299 and having its free end overhanging the end of a lever 388.

The relation of the arm 294 to the lever 295 is such that the initial return movement of the bar 215 will slide the latch-bar 299 longitudinally against the tension of a spring 38| to release the lever 388 to the control of the tension of a spring 382. The lever 388 is fulcrumed at 383 to the side plate I of the base, and the forward end depresses a stud 304 at the end of a bell-crank 305 fulcrumed at 306 to said plate, and having a short arm 301 connected by a link 308 pivotally connected to one arm of a bell-crank 309. The latter is pivotally supported by a stud 3I0, while a second arm of the bell-crank 309 carries a stud 3| I.

l The link 308 carries a long stud 3| 2, having its end connected to a pull rod 3|3 connected to the motor-tripping mechanism to be described.

The motor maybe automatically tripped by the carriage-movement in the usual manner by a lug 3|3 on the stop 44 (Figure 2) engaging a triplever 3I4 to lift a pull connection 3| 5 to rock a bell-crank 3|8, Figure 8, to withdraw the latchbar 299, the bar 299 having a pin-and-slot connection 3 I 1 to provide for an indepedent actuation of the bar by the carriage or by the error-key, as already described.

These several connections just described may be controlled by the usual motor-starting key 3I8, which includes a vertical key-stem 3|9 lifted by a spring 320 to a stop position determined by a screw and a slot 32 I. The lower end of the stem 3|9 has a horizontal arm 322 to overlie the stud 3| I, and is provided with a slot 323 to ride on the stud 3I0 and guide-the lower end of the key-stem. Depression of the key 3|8 against the stud 3|| rocks the bell-crank 309 and pulls the link 308 and the motor-trip connection 3| 3 independently of the locked lever 300.

An interlock between the error-key 214 and the motor-starting key 3|8 prevents the joint operation of both keys as follows. A T-shaped shuttle324 fulcrumed upon a stud 325, threaded into the plate I| 5, has a spring 326 effective to throw the shuttle against a stop-lug 321, see Figure 9, giving the normal position shown at Figure 8. In Figure 9 the motor-key 3| 8 may be depressed without interference with a leg 328 of the shuttle 324; and the rocking of the bell-crank 309 shifts a square projection 329 to overlie an arm 330, forming a part of the arm 281, to intercept any upward movement of the arm 281 and prevent the depression of the error-key 214, through the inability of the cam 283 to lift the blocked )y long narrow tongue 364. 13 is rotated by the pulley 11` the lever 362 will` roll 284. v

The depression of the error-key 214 brings a projecting plate 33|, Figure 9, into contact with a cam-edge 332 of a leg 333 of the shuttle 324, to

vibrate the shuttle and move the leg 328 into an open slot 334 in the adjoining edge of the key-stem 3|9, to prevent the depression of the motor-starting key 3|8 until the error-key is fully restored, and the spring 326 restores the shuttle 324 asa whole to its normal position.

i Figure 10 shows an interlock where the operating lever |80 has cycled the machine, instead of the motor-key 3|8. The rocking of the shaft |19 rotates the cam |18, to engage the roller |11,

to vibrate the arm |16 about the shaft |15, the arm |16 including a spring-arm 336, a restoring spring 331 and an arm 338 to engage a stud 339 on the arm 281. Until the lever |80-is restored to its dotted position, the lifting of the bar 285 by the error-key is prevented by the stud 339 engaging the cam-locked arm 338 of the arm |16.

The subtraction-key 340 includes a sheetmetal push bar 34|, offset to form a stop-face 342 to strike a post 343 fast to the plate-I I5, the post 343 being slotted to receive the bar 34| for a sliding movement. The endv of the bar 34| may be bent at right angles to provide a wide face to be engaged by the upper end of an arm 344 spring-pressed thereagavinst by a spring 345. The

bar 34| may have an individual restoring spring 346. Depression of the subtraction-key 340 operates to rock a shaft 341 to withdraw a hookarm 348 from its notch in a subtraction-setting bar 349 to release said bar to be operated by a spring 350, for subtraction-setting computation.

Another interlock prevents the joint operation of the subtraction-key 340 and error-key 214, and for this purpose a bypass-bar 35| ismounted upon the plate |I for a crosswise longitudinal movement limited by bari-guiding and bar-stopping slots 352 engaging screws 353 threaded into the plate. A suitable spring 354 restores the bar to normal position. Each end of the bar 35| is offset to elevate the'plane of the ends thereof to engage with beveled' studs 355 and. 356 on the key-bars 215 and 34|, respectively. When the error-key 214 is depressed, the stud 355 engages a beveled-corner 351 and cams the bar to the Figure 8 position, where the stud 355 dwells upon the edge of the bar 35|, as shown, which shifts the bar 35| against the tension of the spring 354 and wedges a beveledface 358 at the opposite end of said bar against the stud 356 on the bar 34|, and prevents the depression of the subtraction-key until the return of the error-key restores the bar 35| to normal position. To prevent the springing of the bar 34| if force were applied at the locked-subtraction-key, a barbacking upright stud 359 may be fixed to the plate ||5.

It will be noted at Figure 8 that the normal position of the bar 35| renders the -bar operable by the error-key, and that the subtraction-key 340 may be depressed Without operating said bar.

The mechanism already described for shifting the transposition levers to ineffective positions and for simultaneously preventing the depression of the key-stems |44a may be operated by carriage-return mechanism. The mechanism already described for returningthe carriage includes the pulley 11 to drive the shaft 13. The shaft 13 rotates an eccentric 360 (Figure 3) operative within a slot 36| in a lever 362 to turn the lever about a fixed axis 363 on the frame. The free end of the lever 362 has the form of a As long as the shaft be rocked once for each revolution of the shaft. This lever is hooked upto certain other mechanism so that the latter may be actuated automatically by power to relieve the operator of the manual operation of these parts.

It will be remembered that the rocking of the shaft 63 brings the two clutch members 15 and 16 into a driving interlock and closes the motorcirouit. This rocking of the shaft 63 rocks an arm 365, having a stud 366 engageable within a slot 361 of a bell-crank 358 fulcrumed at 369 'to the upper end of-a bracket 310, secured to the machine-frame by screws 31|. An arm 312 of the bell-crank 368 rests against a .stud 313 of a lever 314, pivoted at 315 to the upper end of a vertical bar 316. The lever 314, through a spring 311 attached thereto, pulls the stud 313 under tension against the arm 312, and when the bellcrank 368 is rocked by the arm 365, the stud 313 will follow the arm 312 and the upper hooked end 318 will move from its normal position shown at Figure 1 to the position of Figure 12, where the hook 3,16 overhangs the tongue 364 of the lever 362; and at the first operation of the motordriven lever 362, the lever 314 and the bar 316 will be lifted to the position of Figure 13, where a fired stop 319 on the bar 316 will engage a notched pawl 380, pivoted at 369 on the bracket 310 and provided with a spring 38|, which is effective to hold the pawl in interlocking position under the stop. To permit a vertical sliding movement for the bar 316, a screw 382 passes through a slot 383 of the bracket 310.

The return of the carriage opens the clutchmembers and 16 by the rocking of the shaft 63, and the stud 366 will rock the pawl 380 from under the stop 319, and the arm 312 will move the lever 314 against the spring-tension of 311, and the hook 318 will be withdrawn clear of the moving tongue 364, and the bar 316 will drop by gravity, assisted by the spring 38 I, until the screw 382 bottoms in the slot 383 of the bracket 310, as shown at Figure 13.

In this manner the initial rotary movement of the shaft 13 lifts the bar 316 and locks it in its extreme lifted position until the end of the carriage-return cycle, and the eccentric 360 continues operating the lever 362 at each revolution thereof, but the lever 362 is ineffective to operate the bar 316 because the locking pawl 360 holds the bar in its raised position above the sweep of the tongue 364.

.centric-connection 386, whereby the extension may be minutely adjusted up or down and sey, cured, and also including a horizontal section 381, to offset a vertical terminal 388, that has a stud 389 workable within a slot 390 in the arm |95. Said arm |85 operates the arm |94 to rock the bell-crank 2|6 with interponent 225 between the key-locking dogs 226, and simultaneously rocks the shaft |88 to silence the transposition levers.' In this manner the lifting of the bar 316 automatically locks the numeral-keys during the carriage return.

At Figure 1,.the case-shift mechanism includes a shift bar 39| upon which the carriage rides, the bar forming a part of a frame 392 swingable about a fulcrum-bar 394 on the frame and operated by a shift-key-lever 393. The frame 392 rocks the bar 394, which carries an arm 394*L to rock vertical arm 395 of a bell-crank, the latter being rockable upon the shaft 50 (Figure 14) to swing a horizontal arm 391, which underlies a stud 398 projecting from the side face of the bar 316, see Figures 3 and 14. This lifts said bar and operates the numeral-key-locking interponent 225 and renders the transposition levers unable to operate the pin-bars.

It will be remembered that the tabulator-keylever 4a rocks the shaft snby meahs of the universal bar 49; and in rocking a lever 399, Figure 14, which underlies the stud 398, the bar 316 is lifted to silence the transposition levers, as already described, during the depression of the tabulatOr-key.

Referring to Figures 1, 21, 22 and 23, showing the connections that drive the pulley |43, it will be seen that the motor-driven horizontal shaft |42 drives a vertical shaft 400 through spiral gears 40|; the shaft 400 having a bearing in the motor-casing 82 and in the partition wall |31. The lower free end of the shaft 400 has pinned thereto a toothed driver 400 always `ro- 2,oe6,12a

the latter having a single tooth 405l to be picked up by the toothed driver 400* to rotate therewith. 'I'he pawl 405 is mounted upon a pivotstud 406 on the carrier 403, and includes a springstud 401, passing through a slot 408, where the free end is connected by a spring 409 to a post 4|0 on the carrier. The spring draws the tooth of the pawl, when released, into the path of the toothed driver 400B.

The' normal positions of the parts are shown at Figure 2l looking at the under side of the motor-casing |08, where a hooked end 4|| of the pawl 465 engages a trip pin 4|2. Normally the carrier 403 is detented by a pawl 4|3, pivoted upon the partition-wall |31 at 4|4, having a V- nose 4|5 to seat in a V-recess 4|6 in the edge of the carrier 403, under the tension of a spring 4|1. The pawl also has a stud 4|8, bearing against a lever 4|9, fulcrumed at 420 to a bar of insulation 42| secured to the wall |31 by screws 422. The free end of the lever 4|9 is supported by a slot-connection with the pivot-stud 4|4, and a post 423 insulated from the lever fiexes a spring-arm 424 to open the motor-circuit by separating the contacts 425.

When the trip pin 4|2 is withdrawn from its pawl-holding position, Figure 21, to the position at Figure 23, in which the spring 409 has vibrated the pawl 405, it will be seen that the end of the slot 408 has brought the tooth 405a into engagement with a tooth of the driver 400, and that simultaneously the stud 4|8 has been withdrawn to release the lever 4|9, so that the contact-arm 424 by its resilience may close the contacts 425 to energize the motor 82.

The initial rotation of the motor rotates the carrier 403 to displace the detent-pawl 4|3 and complete a cycle, when the stud 4|8 will reengage the lever 4|8 to open the contacts 425, and the pawl 4|3 will become effective to arrest the rotating carrier 403. The rotation of the pawl 405 with the carrier 403 brings the hooked end 4|| into engagement with the restored pin 4|2, to turn the pawl about its pivot-stud 406 to withdraw its tooth 405n from the toothed driver This withdrawal of the pawl from the driver 400* may take place before the driver and motor have been fully silenced. The swing-of the released pawl 4|3 may be controlled by a screwand-slot construction 4 3*.

The pawl 4|3 prevents recoil of the carrier after a sudden stopping.

As a means of withdrawing the trip pin 4|2, a bracket 426 is secured to the wall |31, and includes a hollow post 421,` Figure 22, through which the pin 4|2 has a sliding movement. The pin 4|2 includes a head 428, to stop against the face of the bracket 426, and is slotted to pivotally hold a lever 429, the latter having one end secured to a shaft 430 and its other end provided with a. spring 43|. The shaft 430 takes a bearing in an ear 432 of the bracket 426, and the other end takes a bearing in a bracket 433 also secured to the wall |31. 'I'he shaft 430 has a crank-arm 434, carrying a stud 435 engageable by one end of a lever 436 that is fulcrumed at 431 to said bracket 433. The other end of the lever 436 is connected through the link 3|3 to the motorstarting key 3|8; the pulling of the connection 3|3n effecting the withdrawal of the pin 4|2 to enable the pawl 405 to be driven by its spring 409.

At the front of the computing base a snapf switch 438 is operated by a lever 439, to open and close the main-line circuit.

The crank-pin 404 on the carrier 403 supports one end of a pitman 440, that extends forwardly under the computing mechanism. Its end is provided with a stud 44| pivotally connected to a cross-bar 442, the latter connected at each end to the side bars 443 of the general operator. This connection includes slots 444 in each bar 433, with the ends of the cross-bar 442 inserted therein. To prevent endwise displacement of the bar, screws 445 are threaded into the under side of the bar 442, with the heads against the sides 443. To the lower face of the pitman 440 a block 446 may be secured to reinforce the stud-assembly. The stud 44|, passing through a working hole in the bar 442, see Figure 5, and the pitman 440 is threaded into the block 446 and provided with a check nut 441. The cross-bar 442 has a bracket 448 secured thereto and having bent-down ears 449 with pitman-supporting lugs 450 at both edges of the pitman, that provides for a slight swing of the pitman about the stud 44| due to the sweep of the crank-pin 404.

The placing of the motor at the rear of the typewriting machine enables the unit to be desk-supported, and brings the two standard registers close together, and narrows the computing base to approximately the width of the typewriter.

This desk-supported machine-unit may also include a fan-fold unit, as shown at Figure 24. The motor-casing may include sockets 45| at each side of the frame |08, to receive the ends of rods 452, that rise rearwardly, where their free ends are tied together by a platform-supporting rail 453. The rods 452 may be reinforced by tie-bars 454, connected to the typewriter-frame. In this manner are supported a fan-fold web 455 and carbon-feeding elements 456. At Figure 24, the upwardly projecting motor on the base-frame is included in the perspective of this combined typewriting, computing and fan-folding machine, wholly supported by feet resting upon a desk, but the motor may be omitted in some cases. l

From the above description it will be Vnoted that the present invention includes four separate and distinct assemblages, that may be marketed as stock units and subject to individual requisition; that these four units include a typewriting machine, a computing mechanism, a power-driving mechanism and a fan-fold mechanism; that the typewriting machine and computing mechanism may be hooked together for typing and computing, and as a nishing assemblyl operation, the front plate |04, the two side plates ||2 and a rear cover-plate 451 may be secured in position, and the hand-lever |80 added for a manually operated unit to jointly type and compute; that subsequently, the motorunit may be added to this two-part assembled.,y unit for a motor-driven combination; and that;y the fan-fold web-support table may be joined. to the two-part assembled unit or joined to the c three part assembled umt for a' fun and om" amount, to prevent the subsequent depress1on of vsaid key during the item-accumulating stage, said plete assembly, according to my invention.

The machine herein disclosed is further arranged to be automatically set for subtraction when the carriage enters a subtraction-zone, the

mechanism including a trip lever 45B having a pull link 459 connected to a bell-crank 460 operative to withdraw a latch, and release connections effectlve to withdraw the hook 348 from the subtraction-setting bar 349. To operate they trip lever 458, a column-stop 44 is formed with an extension that rides over the trip lever and holds the lever in a tripped position to continue the subtraction-setting of the computing mechanism throughout the computing column-zone, as shown in detail in the O. Minton patent, dated September 24, 1918, 1,280,065.

Referring to the novel column-stop 44 and to Figure 15, it' will be noted that the regular column-stop may be a standard stock unit, andto this stock product there may be assembled, as required, an extension 46| secured by rivets 462 entering pre-drilled holes in the stop. This extension 46| is aligned to trip, and pass over the lever 458 to determine the letter-space extent of the subtractive zone, as heretofore. The tripping of the lever 458 tends to lift the extension 46| and rock the column-stop`44 upon the bar 42, and to prevent this rocking strain upon the stop' the extension 46| may be provided with a reinforcing element that may include a finger 463 secured to the extension 46| near the end thereof and parallel to the stop to pass under and abut the under face of the stop-bar 42 and effectively resist the extensionlifting tendency of the depressible trip lever 458.

This reinforcement of the column-stop to prevent torsional displacement thereof as a Whole, is an important feature where the cooperative parts are a long connected chain of closely fitted and closely adjusted parts, and where even a slight lost motion in the carriage-driven stop 44 might tend to render the computing mechanism inaccurate.

Variations may be resorted to within the Scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting and computing machine having a register with wheels operable to accumulate successive items printed by the numeralkeys of the typewriter, the combination With a key depressible to type a distinguishing character to verify the restoration of all the registerwheels to zero, of a train operable by the initial rotation of any register-wheel in accumulating a printed amount, to prevent the subsequent depression of said key during the item-accumulating stage, said train being restoredby the clearing of the register-wheels to release the key to print its character, said train including a register-wheel detent vibrated by the accumulation of each digit on each wheel, a universal member vibrated by the detent first vibrated by any register-wheel, and a lock having means to detain the universal member in its vibrated position until all the register-Wheels are in their zero positions.

2. In a typewriting and computing machine having a register with Wheels operable to accumulate successive items printed by the numeral-keys kof the typewriter, the combination with a key deij'pi'je'ssible to type a distinguishing character to verify the restoration of all the register-wheels zero, of a train operable by the initial rotation of any register-wheel in accumulating a printed train being restored by the clearing of the register-wheels to release the key to print its character, said train including a register-wheel detent vibrated by the accumulation of each digit on any wheel, a universal member vibrated by the detent rst vibrated by any register-Wheel, and

means eifective to detain the universal member in its rst vibrated position until all the register- Wheels are in their zero-positions, so that said universal member does not interfere with the vibration of any detent by any register-wheel during said accumulating stage.

3. In a typewriting and computing machine having a register with wheels operable to accumulate successive items printed by the numeralkeys of the typewriter, the combination with a key depressible to type a distinguishing character to verify the restoration of all the registerwheels to zero, of a train settable by the initial rotation of any register-wheel in accumulating an amount, to prevent the subsequent depression of said key while any wheel indicates a significant gure, latching means being provided to automatically lock said train in key-locking condition, said latching means being arranged to automatically release said train upon the clearing of the register-wheels to thereby release the key to print its character.

4. In a typewriting and computing machine having a register with wheels operable to accumulate successive items printed by the numeralkeys of the typewriter, the combination with a key depressible to type a distinguishing character to verify the restoration of all the registerwheels to zero, of a train operable by the initial rotation of any register-wheel in accumulating a printed amount, to prevent the subsequent depression ol said key during the item-accumulating stage, said train being restored by the clearing of the register-wheels to release the key to print its character, said train including a registerwheel detent vibrated by the accumulation of each digit on any wheel, a universal member vibrated by the detent first vibrated by any register-wheel, a rocker vibrated by the universal member and connected to lock said key, and a latch effective to drop behind the vibrated rocker to arrest the return of the rocker, so that the latter does not interfere with subsequent vibration of said detents, said latch being released by said universal member when all,the registerwheels are in their zero positions.

5. In a machine of the class described having numeral-keys, and a series of register-wheels operable under indexing control of said keys to accumulate amounts, said register-wheels normally standing at zero position, the combination with register-wheel-detenting means including a spring-pressed detent-element for each register- Wheel, said register-wheel having notches cooperative with said detent-element to locate the several digit-positions of the wheel, of a train settable by the initial rotary movement of any register-wheel at the beginning of the computing period to store up a predetermined amount of energy so as to be potentially effective to aid said detent-elements in aligning said wheels transversely, means being provided to automatically release said train upon all the register-wheels reaching normal zero position, to reinforce the normal pressure of all the detent-elements to remove any spirality in the zero position of the several register-wheels.

6. ln a machine having a typing mechanism superposed on a computing base, said typing mechanism having numeral-keys and a co-operating carriage. and said computing base having spaced sets of denominational register-bars displaceable in denominational order by said carriage for indexing by said' keys: the combination with a tappet on said carriage, of a plurality of sets of denominational thrust-rods, said rod-sets ranging upwardly from connections to corresponding sets of register-bars, and the rod-sets converging so that the upper rod-ends form a plurality of rows, one row behind the other, thereby forming a localized zone for actuation of either set of rods by said tappet, and corresponding rows of vertically-depressible plungers topping the upper ends of said converging sets of rods, the tops of said plungers being engageable by said tappet, means being provided to mount the plungers for vertically endwise actua- 5 tion, and oblique-guiding means being also provided to guide obliquely the upper end-portions of said rods, for axial movements of the rods, said movements being oblique to the axes of said plungers, whereby the rods of the converging sets may be straight to simplify the rods and to afford a straight-line axis of thrust for obviating lostmotion-producing deilection of the rods.

7. A computing-machine base of the character described and serving as a mount for a typewriting machine; said base having a framework including spaced Side-memberS-forming the outer side-walls of said base, each side-member being of hollow construction to afford room within its confines for certain parts of the computing-base mechanism, each side-member vincluding two parts, one part being an inner plate joined to transverse structure of the framework and forming the mechanism-supporting .side-member proper, the other part being afinishing mask substantially coinciding in contour with the outer edges of said inner plate to form lthe side eleva-- 

